Abstract
The density of lipophorin was determined in adult females of Rhodnius prolixus on different days after a meal. Several populations od lipoproteins, differing in density but always in the range of HDL, were found in the hemolymph. The density of the major population was analyzed and a complex profile of density variation was found associated with the principal metabolic events in these insects digestion and oogenesis. During the initial three days after the blood meal, with the onset of the digestive process, the density of lipophorin decreased from 1.1185 g/l to 1.1095 g/l, associated with the transfer of lipids from midgut to the lipophorin particles. During the period of intense vitellogenesis and lipid uptake by the ovary, the lipophorin density started to increase and reached the value, 1.1322 g/l, and remained stable up to the end of oogenesis. As soon as the requirement of lipids to build up the oocytes ceased, the density of lipophorin decreased to its initial value associated with the transfer of lipids from fat body to lipophorin. Soon after the blood meal the midgut was the main source of lipids capable of replenishing the lipophorin particles, while the fat body assumed this function during the succeeding days and re...Continue Reading
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